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Chiral‐Symmetry Selection in Soft Monolayers under Vortical Flow
Author(s) -
PetitGarrido Núria,
Claret Josep,
IgnésMullol Jordi,
Farrera Joan Anton,
Sagués Francesc
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201102358
Subject(s) - monolayer , azobenzene , chirality (physics) , aqueous solution , chemical physics , enantiomer , materials science , chemistry , isomerization , chemical engineering , chiral symmetry breaking , nanotechnology , stereochemistry , symmetry breaking , organic chemistry , physics , molecule , catalysis , nambu–jona lasinio model , quantum mechanics , engineering
Abstract Herein, we report and interpret a new chiral‐selection phenomenon in the orientational ordering of soft‐assembled domains that arise spontaneously in Langmuir monolayers of an azobenzene derivative at the air/water interface. The orientational chirality of isolated sub‐millimeter domains was unambiguously assessed by optical microscopy. The selection process, quantified by using an enantiomeric excess parameter, was controlled by stirring the aqueous subphase. We have studied the dependence of this process on stirring rate and handedness, stirring time, temperature, and on the initial state of the monolayer. The influence of the concomitant cis/trans isomerization on the reported chiral‐selection process is also discussed.